/Engine/Source/Runtime/Engine/Classes/GameFramework/CharacterMovementComponent.h
Whether Character should go into falling mode when walking and changing position, based on an old and new floor result (both of which are considered walkable). Default implementation always returns false.
true if Character should start falling
virtual bool ShouldCatchAir ( const [FFindFloorResult](API\Runtime\Engine\FFindFloorResult) & OldFloor, const [FFindFloorResult](API\Runtime\Engine\FFindFloorResult) & NewFloor )